Statements of Cash Flows (Liquidation Basis) - Liquidation Basis of Accounting [Member] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Cash flows from (used in) operating activities
Cash receipts from interest and dividends	$ 9,795	$ 4,803	$ 1,645
Cash paid for professional fees, governance costs and other administrative costs	(12,455)	(11,886)	(11,683)
Cash paid for Residual Wind-Down Claims and Costs		(11,705)	(10,339)
Cash paid for distributions	(40)	(433)	(112,382)
Cash receipts for refunds, including amounts due others	7	196
Net cash flows used in operating activities	(2,693)	(19,025)	(132,759)
Cash flows from (used in) investing activities
Cash used to purchase marketable securities	(4,331,503)	(3,553,448)	(5,624,032)
Cash from maturities and sales of marketable securities	4,333,458	3,570,716	5,762,701
Net cash flows from investing activities	1,955	17,268	138,669
Cash flows used in financing activities
Cash in Administrative Fund returned to DIP Lenders			(6,000)
Net cash flows used in financing activities			(6,000)
Net decrease in cash and cash equivalents	(738)	(1,757)	(90)
Cash and cash equivalents, beginning of year	2,563	4,320	4,410
Cash and cash equivalents, end of year	$ 1,825	$ 2,563	$ 4,320